20. 



CANADIAN AND 

 MONTANA ROCKIES 



MAJOR SYSTEMS OF CANADIAN CORDILLERA 



The Geological Survey of Canada classifies their great Cordillera into 

 the western and eastern regions, and the western region is further sub- 

 divided into the western system of coastal ranges and the interior system 

 of plateaus and ranges. The eastern Cordilleran region is spoken of as 

 the eastern system. Examine map, Fig. 20.1. 



Western System 



The western system, which here will include the coast ranges and is- 

 lands of southeastern Alaska, is basically Nevadan in its geological com- 

 plexity, and its Mesozoic history has already been described. Its Tertiary 



INDEX 

 WESTERN SYSTEM 



1 . Queen Charlotte Mlns. 



2. Vancouver Island Mlns. 



3. St. Elias Mtns. 



4. Coast Mtns. 



5. Cascade Mtns. 



INTERIOR SYSTEM 



6. Yukon Plateau 



7. Ogilvie Mtns. 



8. Selwyn Mtns. 



9. Pelly Mtns. 



10. Liard Plain and Hyland 



Plateau 



11. Cassiar Mtns. 



12. Omineca Mtns. 



13. Stikine Plateau 



14. Skeena Mtns. 



15. Nass Basin 



16. Hazellon Mtns. 



17. Interior Plateau 



18. Cariboo Mtns. 



19. Monashee Mtns. 



20. Selkirk Mtns. 



21. Purcell Mtns. 



CORDILLERAN REGION 



Fig. 20.1. Physiographic divisions of ihe Canadian Cordillera. Reproduced from Bostock 

 ef a/., 1957. 



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